Analysis of the Survey Results of Phosphate Associated Radioactivity in Yunnan
Based on the survey data of associated radioactivity of phosphate industry enterprises in Yunnan Province and the distribution of phosphate resources in Yunnan province,the natural radioactivity level of phosphate in Yunnan Province was statistically analyzed.The results showed that the reserves of phosphate resources in Yunnan Province ranked second in China,and phosphate enterprises were mainly distributed in Kunming(80%),Yuxi,Qujing,Zhaotong and Honghe Prefecture.The average monitoring value of phosphate gamma radiation dose rate in Yunnan Province is 152 nGy/h,which is about 1 times higher than the control point.Radionuclides were transferred to different degrees along with the whole process.The levels of solid pollutants such as raw phosphate ore,waste rock and waste slag,common calcium heavy calcium and waste were similar,U-RA was basically balanced,U-TH was obviously biased towards U,and 232Th content was low.In phosphate raw materials,most of the 238U and 226Ra activity concentrations were concentrated between 120 and 300 Bq/kg.The migration rule and enrichment effect of radionuclides in phosphate should be studied.
phosphateassociated radioactive oresurvey of pollution sourcesYunnan
万方数据
维普
